Tool-sharpening machine



W. K. DODGE TOOL SHARPENING MACHINE Filed June 30, 1924 Dec. 13, 1927.

N QANRN W/u /f/ME.4LL 0006.6

Patented Dec. 13, 1-927.

Y wapimaam nonea or am; eases; ICLALIFQIRNIIAQ roon-sr'rnnrnn rn'e innenrnnw' Application filed June, 30, 1924. Serial No. 723,327;

which the tool robe sharpened is rubbed back and forth while the stone remains stationary. I

The objects of my invention are to provide a machine which will clamp the whet stone and give it a reciprocatory motion while the tool is held stationary and pressed upon the stone, also such a machine which will. accommodate ordinary whet stones of varying thicknesses or length, also which will provide any desired length of stroke whereby the machine may be set to give the most effective stroke. for the particular length of stone used, also which may be operated by turning a hand crank or may be run by power, also which will provide for clamping to a work bench, also which will present the tool at any desiredangle to the, stone and which will have feeding means so that the tool can be accurately advanced toward the stone as it is ground 01f.

The above and otherobjects are realized in the construction shown in the accom-- panying drawings andin which:

F1 ure 1 18 a Slde v1ew of m machine I e I Fi ure 2 a )lan VlGW' and FIOHI'Q 3 an end v 7 I: V view.

sume a variety of forms and still-function to realize the objects oftheinvention, therefore the drawings must be considered as showing one form only of reducing the invention to practice.

In the form'shown (1) is a frame preferably provided with a clamp (2) for clamping it to a bench or table, and the upper part is adjustable on the frame by means of the screws (6) for accurately adjusting the working fit to the carriage shoulders.

At the end of the frame is an extension arm (7) revolvably supporting a horizontal ly disposed disk (8) connected by a crank arm (9) to the carriage whereby upon revo- Before going into constructional detail, it I should be noted that'my invention may as lution of the disk the carriage is reciprocated.

The throw of the crank may be altered by 'changingvits pivotal screw connection (10) .to any of the. various screwthreaded holes upon the carriage;

. On th under side of the disk is axbevel it may be turnedand upon the reverse side 60 (11)" inthe disc-so-that the length of p stroke can be adjusted-for the-stone used of the wheel is a smaller grooved pulley rim (16). adapted to receive a belt asdotted at (32). in case it is desired to run the machine by'power.

To secure the whet stone upon the carriage a pair of adjustableclampsare used, one (17) is held to the carriage by a screw (18) adapted to fit into any of the tapped holes (19) in the carriage top and is provided with a set screw (20) for hearing against the stone (21) to force itagainst a clamp (17" held by a screw (18) engaging selectively the holes (19 The frame has a bracket post (23) supporting an ad ustable tool carrier (24) in which a tool (25) is clamped by the screw (26) and held for grinding by the reciprocating stone.

The carrier may tion by'the nut (28) but is at all times free to rise and fall on the post, and'is feathered to the post to prevent revolvlng movement.

lift the tool from the'stone, and above the carrier the post is threaded and" has a feed nut (30) adapted for screwing down to force the carrier and tool down toward the stone, but between the nut and carrier is a small spring (31) to make the action of the feed Of course various forms of tool holders (22 carrying a i A spiral spring (29) surrounds the post and normally forces the carrier upward to' e volved on the hori *zontal pivot (27) and clamped to any i will be devised. to suit the particular tool being" ground and I therefore do not desire V to limit myself to this one construction.

A grinding machine comprising a. frame,

upward pressure on the sleeve, said post being threaded above thesleeve, a feed nut 10 engaging the threaded portion of said post and a second coiled sprin around said post between said sleeve and said nut whereby the second spring may exert a desired pressure on said sleeve.

WILL KIMBALL DODGE. 

